Approximately 46.4 grams of sodium acetate (82.0 g/mol)will dissolve in 100 grams of water at 20°C.If 2.75 mol NaCH₃COO is dissolved in 355g H₂O,the solution is __________

Question

Quizplus · Accepted Answer

First, we need to calculate the maximum amount of sodium acetate that can dissolve in 355g of water at 20°C.

Using the given solubility data, we can calculate the maximum amount of sodium acetate that will dissolve in 100g of water:

46.4 g NaCH3COO / 82.0 g/mol = 0.566 mol NaCH3COO

Multiplying this value by the mass of water in the final solution:

0.566 mol/L x 355 g = 201 g NaCH3COO

Therefore, if we dissolve 2.75 mol of NaCH3COO in 355g of water, we have added more solute than the solvent can dissolve at the given temperature. This means that the solution is supersaturated.